What was the name used by the singer whose debut mini-album was Walkin' when she appeared as a contestant on "King of Mask Singer"?
"Skip to the End, Hello"
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Section::::Abstract.
Walkin' (EP)
54346408
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Section::::Abstract.
Suran (singer)
53940885
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Section::::Career.:2017–present: "Wine" and "Walkin"'.

Suran (singer)
53940885